#!/bin/bash
#
# Copyright (C) - 2017 Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com>
#
# This library is free software; you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation; version 2.1 of the License.
#
# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA

CURDIR=$(dirname $0)/
TESTDIR=$CURDIR/../../../

TMPDIR=$(mktemp -d)

#This is needed since the testpoint create a pipe with the consumerd type suffixed
TESTPOINT_BASE_PATH=$(readlink -f "$TMPDIR/lttng.t_p_n")
TESTPOINT_PIPE_PATH=$(mktemp -u "${TESTPOINT_BASE_PATH}.XXXXXX")
TESTPOIT_ARGS="CONSUMER_PAUSE_PIPE_PATH=${TESTPOINT_PIPE_PATH} LTTNG_TESTPOINT_ENABLE=1"
TESTPOINT=$(readlink -f ${CURDIR}/.libs/libpause_consumer.so)


TESTAPP_PATH="$TESTDIR/utils/testapp"
TESTAPP_NAME="gen-ust-events"
TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
TESTAPP_STATE_PATH=$(mktemp -u "$TMPDIR/application_state.XXXXXXXXXX")

NR_ITER=1000
NR_USEC_WAIT=5

SESSION_NAME="my_session"
CHANNEL_NAME="my_channel"

TRACE_PATH=$(mktemp -d)
PAGE_SIZE=$(getconf PAGE_SIZE)

DIR=$(readlink -f $TESTDIR)


source $TESTDIR/utils/utils.sh

function ust_event_generator_toogle_state
{
	ust_event_generator_suspended=$((ust_event_generator_suspended==0))

}
function ust_event_generator
{
	state_file=$1
	ust_event_generator_suspended=0
	trap ust_event_generator_toogle_state SIGUSR1

	while (true); do
		if [[ $ust_event_generator_suspended -eq "1" ]]; then
			touch $state_file
			sleep 0.5
		else
			if [[ -f $state_file ]]; then
				rm -rf $state_file 2> /dev/null
			fi
			taskset  -c 0 $TESTAPP_BIN $NR_ITER $NR_USEC_WAIT > /dev/null 2>&1
		fi
	done
}

consumerd_pipe=()
file_sync_after_first_event=$(mktemp -u)
event_name="tp:tptest"

LTTNG_SESSIOND_ENV_VARS="LTTNG_TESTPOINT_ENABLE=1 CONSUMER_PAUSE_PIPE_PATH=${TESTPOINT_PIPE_PATH} LD_PRELOAD=${TESTPOINT}"
start_lttng_sessiond_notap

create_lttng_session_notap $SESSION_NAME $TRACE_PATH

enable_ust_lttng_channel_notap $SESSION_NAME $CHANNEL_NAME --subbuf-size=$PAGE_SIZE
enable_ust_lttng_event_notap $SESSION_NAME $event_name $CHANNEL_NAME

#This is needed since the testpoint create a pipe with the consumer type suffixed
for f in "$TESTPOINT_BASE_PATH"*; do
	consumerd_pipe+=("$f")
done


ust_event_generator $TESTAPP_STATE_PATH &
APP_PID=$!

$CURDIR/notification LTTNG_DOMAIN_UST $SESSION_NAME $CHANNEL_NAME $APP_PID $TESTAPP_STATE_PATH ${consumerd_pipe[@]}

destroy_lttng_session_notap $SESSION_NAME
stop_lttng_sessiond_notap

# On ungraceful kill the app is cleaned up via the full_cleanup call
# Suppress kill message
kill -9 $APP_PID
wait $APP_PID 2> /dev/null

rm -rf $TMPDIR

# Just in case cleanup
rm -rf $TRACE_PATH